Special Postcard Design Note: Be careful in adding your name/address to a postcard design. As both sides of the mailpiece are fully viewable and the only notice of which side is “up” is postage, do not place your name and address in a standard addressing format (3 lines roughly center of card) on either side of the card – unless you want the card returned to you. Because of the nature of mailed cards and automated sorting systems, cards may get “flipped” in the mail stream and returned to you: this acts as a return service, effectively “using” the postage to mail the card to yourself.